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  • C01B21/44
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CCHEMISTRY METALLURGY C01Inorganic chemistry C01BNON-METALLIC ELEMENTS COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C C01B21/00Nitrogen Compounds thereof

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C01B21/44Concentration
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method for producing concentrated nitric acid and installation for...
    • Patent number 6,969,446
    • Issue date Nov 29, 2005
    • QVF Engineering GmbH
    • Gottfried Dichtl
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    Method of nitric acid formation using a catalytic solution
    • Patent number 6,284,212
    • Issue date Sep 4, 2001
    • Robert N. O'Brien
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    Processes for concentrating nitric acid
    • Patent number 4,966,276
    • Issue date Oct 30, 1990
    • Alfred A. Guenkel
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    Methods for chemically reducing nitrogen oxides
    • Patent number 4,626,417
    • Issue date Dec 2, 1986
    • Union Oil Company of California
    • Donald C. Young
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Method and apparatus for synthesizing anhydrous HNO.sub.3
    • Patent number 4,443,308
    • Issue date Apr 17, 1984
    • The United States of America as represented by United States Department of En...
    • Clifford L. Coon
    • C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
  • Information Patent Grant

    Process for obtaining nitric acid of a concentration higher than th...
    • Patent number 4,064,221
    • Issue date Dec 20, 1977
    • Luis Marzo Rodrigo
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    Preparation of anhydrous nitric acid
    • Patent number 3,981,975
    • Issue date Sep 21, 1976
    • Koppers Company, Inc.
    • Clifford L. Coon
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    3676065
    • Patent number 3,676,065
    • Issue date Jul 11, 1972
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    3647376
    • Patent number 3,647,376
    • Issue date Mar 7, 1972
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    3479254
    • Patent number 3,479,254
    • Issue date Nov 18, 1969
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    3433718
    • Patent number 3,433,718
    • Issue date Mar 18, 1969
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    3401095
    • Patent number 3,401,095
    • Issue date Sep 10, 1968
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    3389960
    • Patent number 3,389,960
    • Issue date Jun 25, 1968
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    3211525
    • Patent number 3,211,525
    • Issue date Oct 12, 1965
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    3106515
    • Patent number 3,106,515
    • Issue date Oct 8, 1963
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    2999009
    • Patent number 2,999,009
    • Issue date Sep 5, 1961
    • C07 - ORGANIC CHEMISTRY
  • Information Patent Grant

    2860035
    • Patent number 2,860,035
    • Issue date Nov 11, 1958
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    2716631
    • Patent number 2,716,631
    • Issue date Aug 30, 1955
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    2463453
    • Patent number 2,463,453
    • Issue date Mar 1, 1949
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    2403902
    • Patent number 2,403,902
    • Issue date Jul 16, 1946
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    2403050
    • Patent number 2,403,050
    • Issue date Jul 2, 1946
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    2343635
    • Patent number 2,343,635
    • Issue date Mar 7, 1944
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    2201631
    • Patent number 2,201,631
    • Issue date May 21, 1940
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    2190304
    • Patent number 2,190,304
    • Issue date Feb 13, 1940
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    2139721
    • Patent number 2,139,721
    • Issue date Dec 13, 1938
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    2130483
    • Patent number 2,130,483
    • Issue date Sep 20, 1938
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    1928749
    • Patent number 1,928,749
    • Issue date Oct 3, 1933
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    1924312
    • Patent number 1,924,312
    • Issue date Aug 29, 1933
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    1922289
    • Patent number 1,922,289
    • Issue date Aug 15, 1933
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    1922278
    • Patent number 1,922,278
    • Issue date Aug 15, 1933
    • C01 - INORGANIC CHEMISTRY

Patents Applicationslast 30 patents